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34 lines
954 B
Zig
34 lines
954 B
Zig
const std = @import("std");
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extern fn shm_open(name: *const i8, oflag: c_int, mode: c_uint) c_int;
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extern fn mmap(addr: ?*anyopaque, length: c_uint, prot: c_int, flags: c_int, fd: c_int, offset: c_uint) *anyopaque;
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extern fn kill(pid: c_int, sig: c_int) c_int;
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extern fn getppid() c_int;
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const SIGUSR1: c_int = 10;
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const O_RDWR: c_int = 2;
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const O_CREAT: c_int = 64;
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pub const PROT_WRITE: c_int = 2;
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pub const MAP_SHARED: c_int = 0x0001;
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// IMPORTANT: shared memory object names must begin with / and contain no other slashes!
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var SHARED_BUFFER: []u8 = undefined;
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pub fn setSharedBuffer(ptr: [*]u8, length: usize) callconv(.C) usize {
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SHARED_BUFFER = ptr[0..length];
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// the rust side expects that a pointer is returned
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return 0;
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}
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pub fn expectFailedStart() callconv(.C) [*]u8 {
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return SHARED_BUFFER.ptr;
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}
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pub fn expectFailedFinalize() callconv(.C) void {
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const parent_pid = getppid();
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_ = kill(parent_pid, SIGUSR1);
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}
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